chill-bundles/src/Bundle/ChillThirdPartyBundle/chill.webpack.config.js

module.exports = function(encore, entries)
{
    // Aliases are used when webpack is trying to resolve modules path
    encore.addAliases({
        ChillThirdPartyAssets: __dirname + '/Resources/public'
    });

    entries.push(__dirname + '/Resources/public/chill/index.js');
};